GB/T 21451.1-2015
石油和液体石油产品 储罐中液位和温度自动测量法 第1部分:常压罐中的液位测量
Petroleum and liquid petroleum products.Measurement of level and temperature in storage tanks by automatic methods.Part 1:Measurement of level in atmospheric tanks
GBT21451.1-2015, GB21451.1-2015